Noun has 1 sense

• semimonthly(n = noun.communication) - a periodical that is published twice each month (or 24 issues per year);

Adjective has 1 sense

• semimonthly(s = adj.all) bimonthly - occurring twice a month; "a semimonthly publication"

Adverbial has 1 sense

• semimonthly(r = adv.all) bimonthly - twice a month; "salaries are paid semimonthly"